|
|
|
| SOLVATION EXTRACTION OF W FROM DILUTE TUNGSTATE SOLUTIONS BY AMINES |
| YU Shuqiu; CHEN Jiayong (CHEN Chia-yung) (Institute of Chemical Metallurgy; Academia Sinica; Beijing) (Manuscript received 4 October; 1983) |
|
Cite this article:
YU Shuqiu; CHEN Jiayong (CHEN Chia-yung) (Institute of Chemical Metallurgy; Academia Sinica; Beijing) (Manuscript received 4 October; 1983). SOLVATION EXTRACTION OF W FROM DILUTE TUNGSTATE SOLUTIONS BY AMINES. Acta Metall Sin, 1984, 20(6): 438-447.
|
|
|
Abstract Solvation extraction of W(VI) from dilute tungstate solutions by dilute organic solutions of amines was studied. It has been found that the mechanism of solvation extraction of W from dilute and concentrated tungstate solutions respectively is different. The W compound extracted into the organic phase from concentrated tungstate solutions by primary amines is indicated to be normal tungstie acid (H_2WO_4) from our earlier work. The present work indicates, however, that the W(Ⅳ)compound or complex extracted by primary amine from dilute tungstate solutions is some other tungsten compound or complex such as WO_2(OH)_2. The hydrophilie complexes were formed first during solvation extraction from dilute W solutions. The complexes are then dehydrated slowly and then transferred into the organic phase. Experiments show that the formation of hydrophilie complex is decreasedwith the increasing of concentration of electrolytes in the aqueous phase. The related infrared and ultraviolet spectra were measured and discussed. Using of tertiary amines as solvation extractant for W was also investigated. It has been found that the tertiary amine just like primary and secondary amines can be used as solvation extractants. As there is no active hydrogen atom in the molecules of tertiary amine, its power of solvation extraction is much lower in comparison with that of primary amines or secondary amines. Large excess amount of tertiary amine has to be used to arrive a high percent of extraction by solration.
|
|
Received: 18 June 1984
|
1 于淑秋;孟祥腾;陈家镛,中国科学,(B),(1982) ,№1,11;Sci.Sin.(B),25(1982) ,№2,113．
2 Yu Shu-chiou; Meng Shiang-sheng; Chen chia-yung, Proc. Int. Solvent Extraction Conf., Liege, Belgium, Paper 80-132, 1980．
3 于淑秋;阵家镛,金属学报,18(1982) ,187．
4 喻克宁;于淑秋;陈家镛,稀有金属,待发表.
5 Kerter, A. S., J. Inorg. Nuclear Chem., 27 (1965) , 209．
6 #12
7 #12
8 洪山海编著,光谱解析法在有机化学中的应用,科学出版社,1980,p.43,365．
9 Yu Shu-chiou; Chen Chia-yung, Proc. Int. Solvent Extraction Conf., Paper 31e (1983) , Am. Inst. Chem. Engrs., Washington |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
